Skip to main content

Prototype Prescribing Outlier Dashboard for Granta Medical Practices

At OpenPrescribing we are piloting a number of data-driven approaches to identify unusual prescribing and collect feedback on this prescribing to inform development of new tools to support prescribers and organisations to audit and review prescribing. These pilot results are provided for the interest of advanced users, although we don't know how relevant they are in practice. There is substantial variation in prescribing behaviours, across various different areas of medicine. Some variation can be explained by demographic changes, or local policies or guidelines, but much of the remaining variation is less easy to explain.

The DataLab is keen to hear your feedback on the results. You can do this by completing the following survey or emailing us at [email protected]. Please DO NOT INCLUDE IDENTIFIABLE PATIENT information in your feedback. All feedback is helpful, you can send short or detailed feedback.

This report has been developed to automatically identify prescribing patterns at a chemical level which are furthest away from “typical prescribing” and can be classified as an “outlier”. We calculate the number of prescriptions for each chemical in the BNF coding system, the count of all prescriptions within that chemical's BNF subparagraph, for prescriptions dispensed between June 2021 and December 2021. We then calculate the ratio of these counts along with the mean and standard deviation of those ratios across all Practices. From this we can calculate the “z-score”, which is a measure of how many standard deviations a given Practice is from the population mean. We then rank your “z-scores” to find the top 10 results where prescribing is an outlier for prescribing higher than its peers and those where it is an outlier for prescribing lower than its peers.

For each outlier chemical, a kernel density estimation plot of all Practice's chemical:subparagraph ratios is provided, with this Practice's ratio overlaid in red.

It is important to remember that this information was generated automatically and it is therefore likely that some of the behaviour is warranted. This report seeks only to collect information about where this variation may be warranted and where it might not, to inform research on this topic. Our full analytical method code is openly available on GitHub here.

This is a new, experimental feature. We'd love to .

Prescribing where Granta Medical Practices is higher than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Glucose 5 Electrolytes and water 140 0.04 0.00 0.00 28.46
Ibuprofen sodium dihydrate 4 Non-steroidal anti-inflammatory drugs 6,366 0.00 0.00 0.00 14.63
Benzocaine 2 Topical local anaesthetics and antipruritics 87 0.02 0.00 0.00 14.07
Meptazinol hydrochloride 622 Opioid analgesics 7,080 0.09 0.00 0.01 8.07
Magnesium citrate 9 Bowel cleansing preparations 12 0.75 0.03 0.16 4.58
Meloxicam 1,458 Non-steroidal anti-inflammatory drugs 6,366 0.23 0.03 0.04 4.48
Alogliptin/metformin 362 Other antidiabetic drugs 4,458 0.08 0.00 0.02 4.34
Chlortalidone 84 Thiazides and related diuretics 4,907 0.02 0.00 0.00 4.34
Glipizide 98 Sulfonylureas 2,433 0.04 0.00 0.01 4.02
Iron and folic acid 76 Oral iron 3,148 0.02 0.00 0.01 3.65

Prescribing where Granta Medical Practices is lower than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Clotrimazole 209 Vaginal and vulval infections 302 0.69 0.90 0.09 -2.45
Ispaghula husk 473 Bulk-forming laxatives 581 0.81 0.96 0.07 -2.06
Ramipril 8,772 Angiotensin-converting enzyme inhibitors 22,036 0.40 0.69 0.17 -1.79
Naproxen 3,316 Non-steroidal anti-inflammatory drugs 6,366 0.52 0.69 0.10 -1.69
Umeclidinium bromide/vilanterol 22 Compound bronchodilator preparations 849 0.03 0.50 0.30 -1.60
Amoxicillin 2,578 Broad-spectrum penicillins 3,448 0.75 0.85 0.07 -1.56
Tramadol hydrochloride 962 Opioid analgesics 7,080 0.14 0.27 0.09 -1.46
Clopidogrel 3,622 Antiplatelet drugs 15,397 0.24 0.32 0.06 -1.44
Indapamide 1,003 Thiazides and related diuretics 4,907 0.20 0.43 0.16 -1.41
Estradiol with progestogen 707 Oestrogens and Hormone Replacement Therapy 3,094 0.23 0.39 0.12 -1.36